asyncrat | 3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 15:58

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General

Target
3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
Size 45KB
Sample260710-telzesex51
SHA256 3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9
MD5 dc36300516d8f199943ade1721e20db1
SHA1 8a8d84c6a9ad59122496350fa1bde8f2ff58245b
SHA512 f406258ad26c6160438b03fd40df59386f233ee1286e5da1277ab933922e1af4a146e552a3f328ca4f40f3d3e61e2f902dc9a074b3336e84dd02528a6579e979
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAUqyE0OFUwdexIkDPIvzjbKgX3iNHJuauSLhTtGqBDo:kuSOpTPOP2EqNTwMv3bdXS5cOxPdMx
TLSH
T14A232B0037E9C12BF2BE4B7459F26245867AF6736603D98A1CC411DB5B23BC58A436FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

phimsexvn.work:80
phimsexvn.work:22
phimsexvn.work:8080
phimsexvn.work:8880
phimsexvn.work:2052
phimsexvn.work:2082
phimsexvn.work:2086
phimsexvn.work:2095
phimsexvn.work:443
phimsexvn.work:2053
phimsexvn.work:2083
phimsexvn.work:2087
phimsexvn.work:2096
phimsexvn.work:8443
www.phimsexvn.work:80
www.phimsexvn.work:22
www.phimsexvn.work:8080
www.phimsexvn.work:8880
www.phimsexvn.work:2052
www.phimsexvn.work:2082
www.phimsexvn.work:2086
www.phimsexvn.work:2095
www.phimsexvn.work:443
www.phimsexvn.work:2053
www.phimsexvn.work:2083
www.phimsexvn.work:2087
www.phimsexvn.work:2096
www.phimsexvn.work:8443
triton.phimsexvn.work:80
triton.phimsexvn.work:22
triton.phimsexvn.work:8080
triton.phimsexvn.work:8880
triton.phimsexvn.work:2052
triton.phimsexvn.work:2082
triton.phimsexvn.work:2086
triton.phimsexvn.work:2095
triton.phimsexvn.work:443
triton.phimsexvn.work:2053
triton.phimsexvn.work:2083
triton.phimsexvn.work:2087
triton.phimsexvn.work:2096
triton.phimsexvn.work:8443
shamoon.phimsexvn.work:80
shamoon.phimsexvn.work:22
shamoon.phimsexvn.work:8080
shamoon.phimsexvn.work:8880
shamoon.phimsexvn.work:2052
shamoon.phimsexvn.work:2082
shamoon.phimsexvn.work:2086
shamoon.phimsexvn.work:2095
shamoon.phimsexvn.work:443
shamoon.phimsexvn.work:2053
shamoon.phimsexvn.work:2083
shamoon.phimsexvn.work:2087
shamoon.phimsexvn.work:2096
shamoon.phimsexvn.work:8443
codered.phimsexvn.work:80
codered.phimsexvn.work:22
codered.phimsexvn.work:8080
codered.phimsexvn.work:8880
codered.phimsexvn.work:2052
codered.phimsexvn.work:2082
codered.phimsexvn.work:2086
codered.phimsexvn.work:2095
codered.phimsexvn.work:443
codered.phimsexvn.work:2053
codered.phimsexvn.work:2083
codered.phimsexvn.work:2087
codered.phimsexvn.work:2096
codered.phimsexvn.work:8443
klez.phimsexvn.work:80
klez.phimsexvn.work:22
klez.phimsexvn.work:8080
klez.phimsexvn.work:8880
klez.phimsexvn.work:2052
klez.phimsexvn.work:2082
klez.phimsexvn.work:2086
klez.phimsexvn.work:2095
klez.phimsexvn.work:443
klez.phimsexvn.work:2053
klez.phimsexvn.work:2083
klez.phimsexvn.work:2087
klez.phimsexvn.work:2096
klez.phimsexvn.work:8443

Mutex

7vE4oOv0OM5d

Attributes

delay
0
install
true
install_file
v8k1.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000e00000001c467-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
6044	v8k1.exe
3408	v8k1.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	v8k1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	v8k1.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5284	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5700	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
Token: SeDebugPrivilege	6044	v8k1.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 4248	3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe	86
PID 3068 wrote to memory of 4696	3068	3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe	87
PID 4248 wrote to memory of 5700	4248	cmd.exe	90
PID 4696 wrote to memory of 5284	4696	cmd.exe	91
PID 4696 wrote to memory of 3408	4696	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe
"C:\Users\Admin\AppData\Local\Temp\3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "v8k1" /tr '"C:\Users\Admin\AppData\Roaming\v8k1.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4248
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "v8k1" /tr '"C:\Users\Admin\AppData\Roaming\v8k1.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5700
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4FCC.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5284
- - C:\Users\Admin\AppData\Roaming\v8k1.exe
    "C:\Users\Admin\AppData\Roaming\v8k1.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3408

C:\Users\Admin\AppData\Roaming\v8k1.exe
"C:\Users\Admin\AppData\Roaming\v8k1.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:6044

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp4FCC.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4FCC.tmp.bat
Size 148B
SHA256 173baa73a1676de320ebc0ee2fe2d417afaa795eb7460acf0dd0c4d2434b19d5
MD5 deecd3751a146842052f7d26cedbd405
SHA1 8bb9086d8a25f4c8e15f55ef8046c6f8cafa4c01
SHA512 900fff45c7e4726ad70c3b5c4187194780e328d5d41ab1ab557573ff0f32782f1d11868b5de602876ea54e8a84360984bc49a7ba76e468ffc1d5b14f65f0bd9c
TLSH
T132C02B4251C9FE0E3C05646302FAD48DD1F2BC193F44BB00C344844D1680448F4EA341
MD5 SHA1 SHA512 TLSH

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v8k1.exe

Path C:\Users\Admin\AppData\Roaming\v8k1.exe
Size 45KB
SHA256 3638f7b5ae0c683b00e8f0143bd39a14dbfeec5988fb495e147e2c847e28e3f9
MD5 dc36300516d8f199943ade1721e20db1
SHA1 8a8d84c6a9ad59122496350fa1bde8f2ff58245b
SHA512 f406258ad26c6160438b03fd40df59386f233ee1286e5da1277ab933922e1af4a146e552a3f328ca4f40f3d3e61e2f902dc9a074b3336e84dd02528a6579e979
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAUqyE0OFUwdexIkDPIvzjbKgX3iNHJuauSLhTtGqBDo:kuSOpTPOP2EqNTwMv3bdXS5cOxPdMx
TLSH
T14A232B0037E9C12BF2BE4B7459F26245867AF6736603D98A1CC411DB5B23BC58A436FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3068-0-0x00000000748C2000-0x00000000748C3000-memory.dmp

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memory/3068-1-0x0000000000100000-0x0000000000112000-memory.dmp

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memory/3068-2-0x00000000748B0000-0x000000007506C000-memory.dmp

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memory/3068-3-0x0000000004C70000-0x0000000004D0C000-memory.dmp

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memory/3068-8-0x00000000748B0000-0x000000007506C000-memory.dmp

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memory/6044-12-0x0000000074730000-0x0000000074EEC000-memory.dmp

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memory/6044-14-0x0000000074730000-0x0000000074EEC000-memory.dmp

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